ABSTRACT
Objectives:
Specific Learning Disorder (SLD) is a disorder in which academic abilities are incompatible with age and intelligence, and whose etiology is not fully elucidated. The aims of this study were to investigate the role of inflammation in the etiopathogenesis of SLD and to examine whether inflammation parameters were useful biomarkers for detecting SLD.
Materials and Methods:
Data of 31 patients between the ages of 7 and 14 years, who were followed-up with the diagnosis of SLD from the pediatric psychiatry outpatient clinic and whose hemogram test results were available, and 33 healthy controls in the same age range, with hemogram test results, were retrospectively analyzed. Neutrophil/lymphocyte ratio (NLR) and platelet/lymphocyte ratio (PLR) values were calculated from hemogram tests. In addition to these values, blood neutrophil, lymphocyte, platelet, erythrocyte counts, and hemoglobin values were compared between the two groups.
Results:
NLR, neutrophil and lymphocyte values were found to be significantly higher in children with SLD than in healthy controls (p=0.001; p=0.033; p=0.030, respectively). Hemoglobin, erythrocyte, platelet and PLR values did not differ significantly between the two groups. Although the NLR values were significantly different between the groups, NLR did not have a significant effect on the determination of being SLD.
Conclusion:
Although the findings show that NLR does not have an effect on SLD, inflammatory markers such as NLR and PLR may also be involved in the etiology of SLD and follow-up studies with larger samples are needed in this area.
Keywords:
Specific learning disorder, inflammation, neutrophil/lymphocyte ratio, platelet/lymphocyte ratio, etiology
References
1güçlüğü “Disleksi” FNG & Bilim Tıp Dergisi. 2016;2:170-176.
2American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders Fifth Edition (DSM-5). Washington DC; ABD; American Psychiatric Publishing; 2013.
3Grigorenko EL. Learning Disabilities. In: Martin A, Volkmar FR, eds. Lewis's Child and Adolescent Psychiatry: A Comprehensive Textbook (4th ed.). Philadelphia; Lippincott Williams & Wilkins; .2007; 410-417.
4Semiz M, Yildirim O, Canan F, Demir S, Hasbek E, Tuman TC, Kayka N, Tosun M. Elevated neutrophil/lymphocyte ratio in patients with schizophrenia. Psychiatr Danub. 2014;26:220-225.
5Kalelioglu T, Akkus M, Karamustafalioglu N, Genc A, Genc ES, Cansiz A, Emul M. Neutrophil-lymphocyte and platelet-lymphocyte ratios as inflammation markers for bipolar disorder. Psychiatry Res. 2015;228:925-927.
6Demircan F, Gözel N, Kılınç F, Ulu R, Atmaca M. The Impact of Red Blood Cell Distribution Width and Neutrophil/Lymphocyte Ratio on the Diagnosis of Major Depressive Disorder. Neurol Ther. 2016;5:27-33.
7Avcil S. Evaluation of the neutrophil/lymphocyte ratio, platelet/lymphocyte ratio, and mean platelet volume as inflammatory markers in children with attention-deficit hyperactivity disorder. Psychiatry Clin Neurosci. 2018;72:522-530.
8Zahorec R. Neutrophil-to-lymphocyte ratio. Sixteen-year-long history since publication of our article in Bratislava Medical Journal. Bratisl Lek Listy. 2017;118:321-323.
9Gunduz N, Timur O, Erzincan E, Tural U. The mean platelet volume, neutrophil lymphocyte ratio, platelet lymphocyte ratio and red cell distribution width in panic disorder. Anatolian Journal of Psychiatry. 2018;19:5-13.
10Karageorgiou V, Milas GP, Michopoulos I. Neutrophil-to-lymphocyte ratio in schizophrenia: A systematic review and meta-analysis. Schizophr Res. 2019;206:4-12.
11Binici NC, Kutlu A. Is ADHD an inflammation-related disorder?. Anatolian Journal of Psychiatry. 2019;20:313-320.
12Bustan Y, Drapisz A, Dor DHB, Avrahami M, Schwartz-Lifshitz M, Weizman A, Barzilay R. Elevated neutrophil to lymphocyte ratio in non-affective psychotic adolescent inpatients: Evidence for early association between inflammation and psychosis. Psychiatry Res. 2018;262:149-153.
13Tural Hesapcioglu S, Kasak M, Cıtak Kurt AN, Ceylan MF. High monocyte level and low lymphocyte to monocyte ratio in autism spectrum disorders. Int J Dev Disabil. 2019;65:73-81.
14Selikowitz M. Dyslexia and other learning difficulties: The facts. New York; Oxford University Press; 1993:1-144.
15Bilbo SD, Schwarz JM. The immune system and developmental programming of brain and behavior. Front Neuroendocrinol. 2012;33:267-286.
16Yirmiya R, Goshen I. Immune modulation of learning, memory, neural plasticity and neurogenesis. Brain Behav Immun. 2011;25:181-213.
17Kılınçaslan A. Özgül Öğrenme Bozukluğu. In: Motavallı Mukaddes N, Ercan ES, eds. Nörogelişimsel Bozukluklar (1st ed.). İstanbul; Nobel Tıp Kitabevi; 2018:193-258.
18Pennington BF, Bishop DV. Relations among speech, language, and reading disorders. Annu Rev Psychol. 2009;60:283-306.
19Nuñez A, Benavente I, Blanco D, Boix H, Cabanas F, Chaffanel M, Colomer-Fernandez B, Lorenzo-Fernandes JR, Loureiro B, Moral MT, Pavon A, Tofe I, Valverde E, Vento M. Estrés oxidativo en la asfixia perinatal y la encefalopatía hipóxico-isquémica [Oxidative stress in perinatal asphyxia and hypoxic-ischaemic encephalopathy]. An Pediatr (Barc). 2018;88:228-228.
20Mazza MG, Tringali AGM, Rossetti A, Botti RE, Clerici M. Cross-sectional study of neutrophil-lymphocyte, platelet-lymphocyte and monocyte-lymphocyte ratios in mood disorders. Gen Hosp Psychiatry. 2019;58:7-12.